.car-img{
    width:100%;
}
nav{
    margin-top: 20px;
}
#sd{
    top:0px;
    position: absolute;
    z-index: -9;
    width:100%;
}
.to-top{
    z-index: 99;
}
.car-cont{
    margin-top: -300px;
    margin-bottom: 300px;
}
